JP6765111B1 - PM removal unit cleaning device and PM removal unit cleaning method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a PM removal unit cleaning technique capable of effectively and efficiently cleaning a PM removal unit. SOLUTION: The case has a PM removing filter for purifying the exhaust gas from a diesel engine and a case containing the PM removing filter, and the case has a first opening and a first opening for passing the exhaust gas into the inside of the case. A PM removal unit cleaning device that is installed with the PM removal unit having two openings removed from the diesel machine and that circulates the cleaning liquid that cleans the PM removal filter. An inflow pipe serving as a passage for the cleaning liquid, an air pipe serving as a passage for compressed air, and a mounting table having an inclined surface are provided, and the inflow pipe and the air pipe are arranged as a double pipe. The PM removal unit is placed on the inclined surface of the above, and the control unit controls to inject the compressed air into the air pipe a plurality of times, and the control of injecting the compressed air initially determines the injection pressure. It is carried out with a weak and short duration, gradually the injection pressure is strongly applied for a long duration, the cleaning liquid passing through the inflow pipe is pressurized with the compressed air, and the double pipe becomes the first opening. A PM removal unit cleaning device that removes and cleans dirt containing PM adhering to the PM removal filter by passing through the inside of the case connected to any side of the second opening. [Selection diagram] FIG. 8

Description

The present invention relates to a technique for cleaning a PM removal unit using a cleaning liquid and compressed air.

Conventionally, a DPF (Diesel Particulate Filter) is known as a filter that collects and removes PM (Particulate Matter: particulate matter) contained in exhaust gas from a diesel engine. DPD (Diesel Particulate Defuser) and DPR (Diesel Particulate Active Reduction System) are also used to perform the same function, but these are collectively referred to as "PM removal filter" below.
Further, the PM removal filter formed of a medium such as ceramic that can withstand a high exhaust temperature is housed in a case (having an inlet and outlet connection) of metal or the like and provided as a PM removal unit, and is provided as a PM removal unit for a truck or a bus. It is often used in such cases.

The PM removal filter can be used to remove PM or engine oil by burning when it is clogged with ash, etc. (soot and / or ash, etc.), which is burnt residue of engine oil, or removed from the diesel machine to clean the PM removal unit, etc. It is necessary to eliminate the clogging due to dirt containing PM (hereinafter, may be simply referred to as "PM") by cleaning or the like.
Due to the high pressure and temperature of the exhaust system, PM is strongly pushed and accumulated against the "dirty" side of the filter until it ultimately reduces engine efficiency. Effective cleaning of the filter usually presents considerable difficulty, as the majority of PM tends to adhere relentlessly to the medium.
On the other hand, the pressure allowed to push the cleaning liquid and gas from the clean side of the PM removal filter to remove PM from the dirty side of the medium and to establish a flow does not destroy the medium. It is also limited to the range and needs to be cleaned without causing damage to the medium.

Here, in order to improve work efficiency and suppress the increase in size of the cleaning device including the cleaning liquid circulation mechanism, the purification unit having the purification element for purifying the exhaust gas and the case containing it is removed from the diesel machine. It has an inflow pipe that circulates the cleaning liquid for the purification element and sends the cleaning liquid to the first opening of the case, and an outflow pipe that receives the cleaning liquid from the second opening of the case, and the flow of the cleaning liquid in the inflow pipe. It has an injection mechanism that sends compressed air to urge, and has a storage tank that stores the cleaning liquid, the case is oriented along the horizontal direction of the internal cleaning liquid flow, and the case is stored in top view. A technique for arranging the water tank above the water tank so as to overlap the water tank is disclosed (see Patent Document 1).

JP-A-2018-165496

However, the cleaning technique disclosed in Patent Document 1 is not sufficient to effectively and efficiently clean the PM removal unit, and a PM removal unit cleaning device with a higher level has been required. ..
The present invention is at a high level that can be reached by trial and error based on the high technical capabilities unique to a manufacturer, and boasts a degree of reality and perfection as a product that cannot be realized at the individual idea level.

An object of the present invention is to provide a PM removal unit cleaning technique capable of effectively and efficiently cleaning a PM removal unit.

The PM removal unit cleaning device of the present invention
It has a PM removal filter that purifies the exhaust gas from the diesel engine and a case that houses the PM removal filter, and the case provides a first opening and a second opening for passing the exhaust gas into the inside of the case. It is a PM removal unit cleaning device configured to circulate a cleaning liquid for cleaning the PM removal filter while installing the PM removal unit having the PM removal unit removed from the diesel machine.
It is provided with a control unit, an inflow pipe serving as a passage for the cleaning liquid, an air pipe serving as a passage for compressed air, and a mounting table having an inclined surface.
The inflow pipe and the air pipe are arranged as a double pipe,
The PM removal unit is placed on the inclined surface of the above-mentioned stand.
The control unit controls to inject the compressed air into the air pipe a plurality of times.
The control for injecting the compressed air is initially carried out with a weak injection pressure and a short duration, and then gradually the injection pressure is strongly applied for a long duration.
The cleaning liquid passing through the inflow pipe is pressurized by the compressed air so that the double pipe passes through the inside of the case connected to either side of the first opening and the second opening. Then, the dirt containing PM adhering to the PM removal filter is removed and washed.
With such a configuration, since the inflow pipe 100 and the air pipe 200 are double pipes, the outer inflow pipe 100 serves as a passage for the cleaning liquid L, the inner air pipe 200 serves as a passage for the compressed air P, and the cleaning liquid L becomes a passage. Since the flow direction of the compressed air P and the flow direction of the compressed air P are the same, it is possible to efficiently transmit (urge) the pressure to the cleaning liquid L, and effectively and efficiently and stably remove PM. The filter 21 can be cleaned. For example, when the compressed air P is injected into a place where the inflow pipe 100 is bent at a dogleg shape or an angle of 90 degrees, the pressure of the cleaning liquid L is relatively low, so that the water flow is temporary. It is possible to avoid the inconvenience that the water flow becomes unstable (water rampages) and the cleaning effect efficiency is lowered.
Further, the PM removal unit 20 is placed on a mounting table 30 provided with an inclined surface, and by holding the PM removal unit 20 in an oblique state, the cleaning liquid L is fully accumulated inside the case 22 to create an air space. For example, when the PM removal unit 20 is held horizontally instead of diagonally, the upper space of the case 22 is not filled with the cleaning liquid L due to the flow of the cleaning liquid L passing through the inside of the case 22. Even if the compressed air P is sent in, the space may not be transmitted efficiently, and such an inconvenience can be avoided.
Further, the injection of the compressed air P is controlled so that the injection pressure is initially weak and has a short duration, and the injection pressure is gradually increased to be strong and has a long duration. If the injection pressure is strongly applied, PM as dirt is pushed more rapidly than necessary, and it is possible to avoid the inconvenience that the clogging of the PM removal filter 21 becomes even stronger.

The PM removal unit cleaning method of the present invention
It has a PM removal filter that purifies the exhaust gas from the diesel engine and a case that houses the PM removal filter, and the case provides a first opening and a second opening for passing the exhaust gas into the inside of the case. The PM removal unit to be installed is installed in a state of being removed from the diesel machine, and is configured to circulate the cleaning liquid for cleaning the PM removal filter, and is composed of a control unit, an inflow pipe serving as a passage for the cleaning liquid, and compressed air. It is a PM removal unit cleaning method using a PM removal unit cleaning device including an air pipe serving as a passage and a mounting table having an inclined surface.
The step of placing the PM removal unit on the inclined surface of the above-mentioned stand and
The control unit controls to inject the compressed air into the air pipe a plurality of times, and the control to inject the compressed air is initially performed with a weak injection pressure and a short duration, and then gradually the injection pressure. And the process of carrying out a strong and long duration
The cleaning liquid passing through the inflow pipe is pressurized by the compressed air, and the double pipe composed of the inflow pipe and the air pipe is connected to either side of the first opening or the second opening. It has a step of removing dirt containing PM adhering to the PM removal filter and cleaning by passing the inside of the case.

According to the present invention, it is possible to provide a PM removal unit cleaning technique capable of effectively and efficiently cleaning the PM removal unit.

It is a front view of the PM removal unit cleaning apparatus in embodiment of this invention. It is a rear view of the PM removal unit cleaning apparatus in embodiment of this invention. It is a top view of the PM removal unit cleaning apparatus in embodiment of this invention. It is a bottom view of the PM removal unit cleaning apparatus in embodiment of this invention. It is a right side view of the PM removal unit cleaning apparatus in embodiment of this invention. It is a left side view of the PM removal unit cleaning apparatus in embodiment of this invention. It is a perspective view of the PM removal unit cleaning apparatus in embodiment of this invention. It is a front view of the PM removal unit cleaning device in the embodiment of the present invention without a door. It is a partial cross-sectional view explaining the structure of the double tube of the PM removal unit cleaning apparatus in embodiment of this invention. FIG. 5 is a cross-sectional view taken along the line AA, BB, CC, and DD of FIGS. 1 and 5 of the PM removal unit cleaning device according to the embodiment of the present invention. FIG. 7 is a cross-sectional view taken along the line EE of FIG. 7 of the PM removal unit cleaning device according to the embodiment of the present invention. It is a figure explaining the cleaning flow of the PM removal unit cleaning apparatus in embodiment of this invention.

Hereinafter, the PM removal unit cleaning device 10 according to the embodiment of the present invention will be described in detail with reference to the drawings.
The PM removal unit cleaning device 10 shown in FIGS. 1 to 11 cleans the PM removal unit 20 used in diesel machines such as trucks, tractors, buses, railways, ships, generators, and pumps equipped with a diesel engine. Is.
The PM removal unit cleaning device 10 cleans the PM removal unit 20 in a state of being removed from a diesel machine such as a diesel vehicle with the cleaning liquid L. The PM removal unit cleaning device 10 has a circulation path described later for circulating the cleaning liquid L.
The PM removal unit cleaning device 10 can be opened and closed by a double door 12 and a lower door 13 (each with a fixed handle or a rotary lever type handle) provided in a stainless steel housing 11. Further, the upper door 12 is provided with a window 12a that allows an operator to observe the PM removal unit 20, connection fixtures, etc., and visually inspect the amount of cleaning liquid L, the degree of dirt, etc. during the cleaning process. There is.
Further, the ceiling of the housing 11 of the PM removal unit cleaning device 10 has an opening, and the PM removal unit 20 when the size and weight cannot be held by hand is hung by a crane or the like and the housing is opened from the opening. It is designed to be put in 11. The ceiling plate 14a and the ceiling lighting plate 14b block the opening, and the ceiling lighting plate 14b is made of acrylic, and the inside of the housing 11 can be visually recognized by shining light through the acrylic during cleaning or the like. It's easier to do. The ceiling plate 14a may also be made of acrylic or the like and have translucency.

In particular, referring to FIG. 8 (a diagram showing the internal structure with the upper door 12 and the lower door 13 removed), the PM removal unit 20 is composed of a PM removal filter (main body) 21 and a case 22. ..
The PM removal filter 21 (including, for example, a DPF, a DPD having a similar function, a DPR, a catalyzer, and the like) is housed and housed in the case 22. Therefore, the cleaning liquid L passing through the case 22 removes the PM-containing stains (hereinafter, may be simply referred to as “PM”) adhering to the PM removal filter 21 for cleaning.
The cleaning liquid L is preferably an aqueous solution containing a solvent (detergent), and in particular, in order to efficiently remove PM, the solvent is preferably alkaline, but the components thereof are not particularly limited. ..
The case 22 may be made of, for example, ceramic or stainless steel. The case 22 has various shapes, and it is necessary to use a PM removal unit cleaning device 10 that can handle various shapes. It may include a catalytic converter or the like.
Here, the case 22 has a tubular body portion and a first end portion 22a and a second opening portion as first openings that are located on both sides of the body portion in the longitudinal direction and are formed thinner than the body portion. It has a second end portion 22b as a.

The PM removal unit 20 is arranged so that the inflow and outflow directions of the exhaust gas of the PM removal filter 21 coincide with (correspond to) the flow direction (indicated by the arrow) of the cleaning liquid L. That is, in FIG. 8, the first end 22a is arranged on the left side and the second end 22b is on the right side, and the PM removal filter 21 is exhausted on the right side (the side closer to the second end 22b) in the drawing. The PM of the gas is pushed away and is in a more accumulated "dirty" side. The orientation of the PM removal unit 20 is preferably as described above, but there may be cases where cleaning is possible even in the opposite orientation.

Further, the PM removal unit 20 is mounted on a mounting table 30 provided with an inclined surface, and the position is regulated (sliding stop) by the support member 31. The support member 31 is not essential, and the support member 31 may be integrally formed with the mounting table 30.
The mounting table 30 is provided on the upper surface of the partition plate 40 that partitions the inside of the housing 11 into the upper part and the lower part, and the height position on the second end 22b side (outlet side of the cleaning liquid L) of the PM removal unit 20 is set to the first. It is used to make it relatively higher than the end 22a side (the inlet side of the cleaning liquid L).
The tilt angle of the mounting table 30 is 5 degrees to 85 degrees, and 15 degrees to 30 degrees is particularly preferable.
By holding the PM removal unit 20 in an oblique state, the cleaning liquid L is filled (nearly full) inside the case 22, and no air space remains (almost no air space remains). If the PM removal unit 20 is held horizontally instead of diagonally, the cleaning liquid L is not filled in the upper space of the case 22 depending on the flow of the cleaning liquid L passing through the inside of the case 22, and the air space remains, and the compressed air remains. Even if P is sent, a situation may occur in which the pressure is not efficiently transmitted, and such a situation can be avoided.
In addition, in order to suspend and hold the PM removal unit 20 in an oblique state, a band, a chain, a member formed in an elongated shape, a net shape, a sheet shape, or the like may be provided.

The PM removal unit cleaning device 10 includes an inflow pipe 100 as a liquid supply conduit connected to the case 22 so as to send the cleaning liquid L to the inside of the case 22. The cleaning liquid L sent from the inflow pipe 100 enters the inside of the case 22 through the first end portion 22a, and the cleaning liquid L that has passed through the inside of the case 22, that is, the PM removal filter 21 is discharged through the second end portion 22b. Will be done.
Further, the PM removal unit cleaning device 10 is connected so as to be inserted into the inflow pipe 100 so as to urge the cleaning liquid L in the inflow pipe 100 along the flow direction thereof, and compressed air (applied) into the inflow pipe 100. An air pipe 200 is provided as a gas supply conduit for sending compressed air) P. It may be configured to send a compressed gas other than the compressed air P. The air tank 80 installed outside the housing 11 is connected to the compressed air P via a hose (made of resin or the like) connected from a fluid supply means such as a compressor (not shown) installed outside the housing 11. Is supplied. Compressed air P is injected into the air pipe 200 via the air pipe and the hose connected to the air tank 80.
By injecting the compressed air P, the cleaning liquid L is pressurized at once (generating a rightward pressure in the figure) and extruded, and the cleaning liquid L and the compressed air P are inside the case 22, that is, in the PM removal filter 21. It is forced to pass through the medium due to the resistance of clogging by PM, and the PM adhering at that time is removed and washed away. The injection of the compressed air P may be automatically controlled by the control system mechanism 70, or at least a part thereof may be manually controlled. Fine adjustment may be performed while observing the amount of the cleaning liquid L discharged from the second end portion 22b, the degree of dirt, and the like. The injection (pressure pulse) of the compressed air P may be performed a plurality of times such as several tens of times. The injection duration, injection timing, number of injections, injection pressure, and the like may be controlled differently according to the shape of the PM removal unit 20, the degree of dirt, and the like. The injection of the compressed air P may be performed so that the injection pressure is initially weak and has a short duration, and the injection pressure is gradually strengthened and has a long duration (out of a plurality of injections). The water flow of the cleaning liquid L is constant). This is because if the injection pressure is first strongly applied, PM as dirt will be pushed more rapidly than necessary, and there is a risk that the clogging of the PM removal filter 21 will be further strengthened.

Here, referring to FIG. 9, the thickness (diameter, etc.) of the inflow pipe 100 is larger than the thickness (diameter, etc.) of the air pipe 200, and the air pipe 200 is inserted by opening a part of the inflow pipe 100. It is configured as a double pipe. As a matter of course, the connecting portion between the inflow pipe 100 and the air pipe 200 is watertight (airtight) by welding or the like.
The first end 22a side (inlet side of the cleaning liquid L) of the PM removal unit 20 is formed as a double pipe by various adapters and various connection fixtures (attachments such as connection pipe materials, for example, a cam lock coupler and a cam lock adapter). Of the configured inflow pipe 100 and air pipe 200, it is connected to the outer inflow pipe 100.

Since the inflow pipe 100 and the air pipe 200 are configured as double pipes, the outer inflow pipe 100 serves as a passage for the cleaning liquid L, the inner air pipe 200 serves as a passage for the compressed air P, and the flow direction and compression of the cleaning liquid L. Since the flow directions of the air P are the same, the pressure can be efficiently transmitted (urged) to the cleaning liquid L, and the PM removal filter 21 is effectively and efficiently and stably cleaned. be able to. For example, when compressed air P is injected into a place where the inflow pipe 100 is bent at a right angle or an angle of 90 degrees, the water flow is temporarily blocked due to the pressure difference with the cleaning liquid L. It becomes unstable (water rampages) and the cleaning effect efficiency decreases.

The heat filtration tank 50 has a function of removing PM and the like mixed in the cleaning liquid L that circulates with the cleaning of the PM removal filter 21, and the housing 11 is connected to the inflow port 51 formed at the top of the heat filtration tank 50. The cleaning liquid L discharged from the second end 22b side (outlet side of the cleaning liquid) of the PM removing unit 20 into the upper space and scattered is freely dropped from the inflow port 51 and collected. A plurality of partition walls 52 are arranged side by side in the heating filtration tank 50 at intervals in the flow direction of the cleaning liquid L, and PM and the like settle while the cleaning liquid L flows up and down along the partition wall 52. And deposit on the bottom of the heating filtration tank 50. By opening a predetermined valve, a part of the bottom of the heat filtration tank 50 is opened, and the precipitated PM can be discharged to the outside of the heat filtration tank 50. In addition, PM or the like may be collected by providing a cleaning liquid filter (for example, a porous body made of polyvinyl chloride) or the like.
The heating filtration tank 50 incorporates a heater having a function of heating the cleaning liquid L in order to increase the cleaning effect, and keeps the temperature of the cleaning liquid L at a predetermined temperature (preferably 50 ° C. to 70 ° C.). Cleaning efficiency can be maintained.

The PM removal unit cleaning device 10 includes a circulation mechanism 60 that sends the cleaning liquid L filtered by the heating filtration tank 50 toward the inflow pipe 100 so as to circulate in the PM removal unit cleaning device 10. The circulation mechanism 60 may include a circulation pump configured to pump the cleaning liquid L in the heating filtration tank 50 toward the inflow pipe 100, a circulation pipe, and the like. By opening and closing the valve of the circulation pump, it is possible to circulate fresh water for rinsing and clean the inside of the housing 11. A drainage mechanism 90 for rinsing may be provided.

The PM removal unit cleaning device 10 includes a control system mechanism 70. The system operation can be controlled by a known computer system including a CPU (Central Processing Unite), a memory, and the like. At the start of the cleaning cycle, the operator can select conditions from the settings prepared in advance and start the work. Control parameters (including the timing, number of times, and duration of pulses of compressed air P) that need to be adjusted during cleaning, such as the shape of parts and the degree of dirt, can be individually set and changed. The status of the device (operation status, failure, warning, etc.) can be notified to the operator using a display or an indicator, and can be output to an external computer or database as needed.

Next, an example of a method for cleaning the PM removal unit 20 using the PM removal unit cleaning device 10 according to the embodiment of the present invention will be described in detail with reference to the flowchart of FIG.

First, the operator opens the upper door 12 by the handle of the double door 12 provided in the housing 11 of the PM removal unit cleaning device 10, and separates water (fresh water) and solvent (detergent) from the partition plate 40. It is charged onto the upper surface and freely dropped from the inflow port 51 into the heating filtration tank 50 to obtain the cleaning liquid L (step S1). The water and the solvent are sufficiently mixed while circulating in the circulation path of the PM removal unit cleaning device 10. Of course, water (fresh water) / solvent or cleaning liquid L may be supplied from a faucet or another source through a predetermined line (including charging the solvent (detergent) into the heating filtration tank 50). Further, the heavily soiled PM removal filter 21 may be provided with a cleaning liquid L inside before cleaning, soaked for a predetermined time, and then the PM removal unit cleaning device 10 starts cleaning from that state. ..

Next, the operator places the PM removal unit 20 removed from the diesel machine on the mounting table 30, and attaches the first end 22a side (inlet side of the cleaning liquid L) of the PM removal unit 20 to the adapter. And, of the inflow pipe 100 and the air pipe 200 configured as a double pipe, the inflow pipe 100 is connected to and set by a connection fixture or the like (step S2). The tilt angle of the mounting table 30 is 5 degrees to 85 degrees, and 15 degrees to 30 degrees is particularly preferable. Further, the PM removal unit 20 is arranged so that the inflow and outflow directions of the exhaust gas of the PM removal filter 21 coincide with (correspond to) the flow direction of the cleaning liquid L.

The operator closes the upper door 12 and starts the cleaning control operation by pressing a predetermined button of the control system mechanism 70 or the like (step S3). At this time, values such as injection duration, injection timing, number of injections, and injection pressure may be adjusted and input according to the shape of the PM removal unit 20, the degree of dirt, and the like.

Then, the cleaning liquid L in the heating filtration tank 50 is sent toward the inflow pipe 100 by the circulation mechanism 60 (step S4). The circulation mechanism 60 may include a circulation pump configured to pump the cleaning liquid L in the heating filtration tank 50 toward the inflow pipe 100, a circulation pipe, and the like.

Since the cleaning liquid L sent from the inflow pipe 100 enters the inside of the case 22 through the first end 22a of the PM removal unit 20, the PM removal unit 20 is held in an oblique state by the mounting table 30. The cleaning liquid L is filled (nearly full) inside the case 22 so that no air space remains (almost no air space remains), and in many cases, the inside of the case 22, that is, completely clogged. A part of the cleaning liquid L that has passed through the PM removal filter 21, which is not the same, is gradually discharged through the second end portion 22b (step S5).

Next, the PM removal unit cleaning device 10 injects compressed air (pressurized air) P from the air pipe 200 and urges the cleaning liquid L in the inflow pipe 100 along the flow direction (step S6). By injecting the compressed air P, the cleaning liquid L is pressurized at once (generating a rightward pressure in FIG. 8) and extruded, and the cleaning liquid L and the compressed air P are inside the case 22, that is, the PM removal filter 21. The PM is forced to pass through the medium due to the resistance of clogging by the PM, and at that time, the PM is removed and washed away. That is, the cleaning liquid L pressurized by the compressed air P enters the inside of the case 22 through the first end portion 22a, pushes out the cleaning liquid L that is fully accumulated inside the case 22, and the cleaning liquid L is the second end. It is discharged through the portion 22b.
Since the inflow pipe 100 and the air pipe 200 are configured as double pipes, the outer inflow pipe 100 serves as a passage for the cleaning liquid L, the inner air pipe 200 serves as a passage for the compressed air P, and the flow direction and compression of the cleaning liquid L. Since the flow directions of the air P are the same, the pressure can be efficiently transmitted (urged) to the cleaning liquid L, and the PM removal filter 21 is effectively and efficiently and stably cleaned. be able to.
Here, the injection of the compressed air P is performed a plurality of times so that the injection pressure is initially weak and has a short duration, and the injection pressure is gradually controlled to be strong and has a long duration. Can be removed effectively and efficiently. The injection (pressure pulse) of the compressed air P may be performed a plurality of times such as several tens of times.

The cleaning liquid L discharged from the second end 22b side (outlet side of the cleaning liquid) of the PM removal unit 20 into the upper space of the housing 11 and scattered freely falls from the inflow port 51 into the heating filtration tank 50. While the cleaning liquid L is collected and flows up and down along the partition wall 52, PM and the like mixed in the cleaning liquid L that circulates with the cleaning of the PM removal filter 21 precipitates and accumulates on the bottom of the heating filtration tank 50. (Step S7). The operator opens the lower door 13 by the handle of the double door 13 provided in the housing 11 of the PM removal unit cleaning device 10 at an appropriate timing, and opens a predetermined valve to perform heat filtration. A part of the bottom of the tank 50 is opened, and the precipitated PM can be discharged to the outside of the heating filtration tank 50.
The heating filtration tank 50 incorporates a heater (not shown) having a function of heating the cleaning liquid L in order to increase the cleaning effect, and the temperature of the cleaning liquid L is preferably a predetermined temperature (50 ° C. to 70 ° C.). It may be kept at.).

Then, the PM removal unit cleaning device 10 causes the cleaning liquid L in the heating filtration tank 50 to be circulated in the inflow pipe 100 by the circulation mechanism 60 so that the cleaning liquid L filtered by the heating filtration tank 50 is circulated in the PM removal unit cleaning device 10. And return to step S4 above.

The injection of the compressed air P in the circulation of the cleaning liquid L may be automatically controlled by the control system mechanism 70, or at least a part thereof may be manually controlled by the operator. The operator may make fine adjustments while visually inspecting the window 12a of the upper door 12 and observing the amount of the cleaning liquid L discharged from the second end portion 22b, the degree of dirt, and the like.

When the predetermined plurality of injections of the compressed air P in the circulation of the cleaning liquid L are completed and the cleaning of the PM removal filter 21 is completed, the predetermined valve is opened and closed to remain in the heating filtration tank 50. The used cleaning liquid L is discharged using the drainage mechanism 90, and the PM removal unit 20 is rinsed with fresh water for rinsing (step S8). The route of fresh water for rinsing is such that water is supplied from the rinsing water supply mechanism 91, from the circulation mechanism 60 to the PM removal unit 20, further from the inflow port 51 to the heating filtration tank 50, and to the drainage mechanism 90.
Further, when the used cleaning liquid L is less contaminated and deteriorated, it can be used for the next cleaning, so that the PM removal unit 20 can be rinsed while the used cleaning liquid L remains in the heating filtration tank 50. For example, a drainage pipe that does not pass through the heating filtration tank 50 may be added from the vicinity of the inflow port 51 to connect to the drainage mechanism 90, or a drainage port dedicated to rinsing may be provided near the inflow port 51. It may be provided or the like.
When the rinsing is completed, the operator removes the PM removal unit 20 to finish the process. It is also possible to clean the inside of the housing 11 by circulating fresh water for rinsing.

According to the above embodiment, it is possible to realize the PM removal unit cleaning device 10 capable of effectively and efficiently cleaning the PM removal unit 20.
In particular, since the inflow pipe 100 and the air pipe 200 are configured as double pipes, the outer inflow pipe 100 serves as a passage for the cleaning liquid L, the inner air pipe 200 serves as a passage for the compressed air P, and the flow direction of the cleaning liquid L. Since the flow directions of the compressed air P and the compressed air P are the same, the pressure can be efficiently transmitted (urged) to the cleaning liquid L, and the PM removal filter 21 can be effectively and efficiently and stably used. It can be cleaned. For example, when compressed air P is injected into a place where the inflow pipe 100 is bent at a dogleg shape or an angle of 90 degrees, the pressure of the cleaning liquid L is relatively low, so that the water flow is temporarily blocked. It is possible to avoid the inconvenience that the water flow becomes unstable (water violently) and the cleaning effect efficiency is lowered.

Further, the PM removal unit 20 is placed on a mounting table 30 provided with an inclined surface, and by holding the PM removal unit 20 in an oblique state, the cleaning liquid L is fully accumulated inside the case 22 to create an air space. For example, when the PM removal unit 20 is held horizontally instead of diagonally, the upper space of the case 22 is not filled with the cleaning liquid L due to the flow of the cleaning liquid L passing through the inside of the case 22. Even if the compressed air P is sent in, the space may not be transmitted efficiently, and such an inconvenience can be avoided.

Further, the injection of the compressed air P is controlled so that the injection pressure is initially weak and has a short duration, and the injection pressure is gradually increased to be strong and has a long duration. If the injection pressure is strongly applied, PM as dirt is pushed more rapidly than necessary, and it is possible to avoid the inconvenience that the clogging of the PM removal filter 21 becomes even stronger.

In addition, although not illustrated one by one, the present invention may be implemented with various modifications within a range not deviating from the gist thereof. The size, number, material, position, etc. of each component can be appropriately changed as long as the effects of the present invention are obtained. The tilt angle of the mounting table 30 may not be provided, or the mounting table 30 itself may not be provided.

10 PM removal unit cleaning device 11 Housing 12 Upper door 12a Window 13 Lower door 14a Ceiling plate 14b Ceiling lighting plate 20 PM removal unit 21 PM removal filter 22 Case 22a 1st end 22b 2nd end 30 Mounting stand 31 Support member 40 Partition plate 50 Heat filtration tank 51 Inflow port 52 Partition 60 Circulation mechanism 70 Control system mechanism 80 Air tank 90 Drainage mechanism 91 Rinse water supply mechanism 100 Inflow pipe 200 Air pipe

Claims (2)

It has a PM removal filter that purifies the exhaust gas from the diesel engine and a case that houses the PM removal filter, and the case provides a first opening and a second opening for passing the exhaust gas into the inside of the case. It is a PM removal unit cleaning device configured to circulate a cleaning liquid for cleaning the PM removal filter while installing the PM removal unit having the PM removal unit removed from the diesel machine.
It is provided with a control unit, an inflow pipe serving as a passage for the cleaning liquid, an air pipe serving as a passage for compressed air, and a mounting table having an inclined surface.
The inflow pipe and the air pipe are arranged as a double pipe,
The PM removal unit is placed on the inclined surface of the above-mentioned stand.
The control unit controls to inject the compressed air into the air pipe a plurality of times.
The control for injecting the compressed air is initially carried out with a weak injection pressure and a short duration, and then gradually the injection pressure is strongly applied for a long duration.
The cleaning liquid passing through the inflow pipe is pressurized by the compressed air so that the double pipe passes through the inside of the case connected to either side of the first opening and the second opening. A PM removal unit cleaning device that removes and cleans dirt containing PM adhering to the PM removal filter. It has a PM removal filter that purifies the exhaust gas from the diesel engine and a case that houses the PM removal filter, and the case provides a first opening and a second opening for passing the exhaust gas into the inside of the case. The PM removal unit to be installed is installed in a state of being removed from the diesel machine, and is configured to circulate the cleaning liquid for cleaning the PM removal filter, and is composed of a control unit, an inflow pipe serving as a passage for the cleaning liquid, and compressed air. It is a PM removal unit cleaning method using a PM removal unit cleaning device including an air pipe serving as a passage and a mounting table having an inclined surface.
The step of placing the PM removal unit on the inclined surface of the above-mentioned stand and
The control unit controls to inject the compressed air into the air pipe a plurality of times, and the control to inject the compressed air is initially performed with a weak injection pressure and a short duration, and then gradually the injection pressure. And the process of carrying out a strong and long duration
The cleaning liquid passing through the inflow pipe is pressurized by the compressed air, and the double pipe composed of the inflow pipe and the air pipe is connected to either side of the first opening or the second opening. A method for cleaning a PM removal unit, which comprises a step of removing dirt containing PM adhering to the PM removal filter by passing it through the inside of the case.

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